I understand that the centrifuge gives some materials that you cant get otherwise (silver ore is not in default IC2, but needed to make glass cables, etc.) but in a modpack where it isnt necessary to get those materials that way, the balance of the three ore processing machines pushes players to *not* make the additional machines.
MAcerator: cheap to make, cheap to run, EASY to run, doubles ores.
Ore Washer: cheap to make and run, a bit more involved to run (water) and gives a few tiny dusts, which require auto crafting to make into full dusts. Overall maybe a 1.2x ore bonus?
Thermal Centrifuge: expensive to make and run, also just gives a few bonus dusts.
I am playing Enignatica 2 expert pack and the only reason to make the washer and centifuge is because I love IC2. Other than that, no player will go beyond the Macerator. Its a lot of work for just a bit more resources.
Suggestion would be to make the macerator give the smallest boost to ore processing, the washer a bit more, and finally the centrifuge the biggest boost. Unfortunately, if the macerator were downgraded, people would be annoyed with IC2 even more, and to just boost the washer and centifuge means, for purist IC2 players, ore production that is too OP. Personally id love if the macerator gave out 1 large dust and a few tiny, and then the ore washer did the same, and the centifuge actually doubled ores, or something like that. But again, i realize that most players wouldnt like that idea.